Belt-shifter.



1.]. FRYNE.

BELT SHIFTER.

APPLICATION FILED DEC-21,1914.

11. ,1 96,347., Patented Aug. 29, 1916.

3 SHEETS-SHEET I.

MINA/E8858:

F M ATTORNEY J. J. FRYNE.

BELT SHIFTER. APPLICATION men 050.21. 1914.

Patented Aug". 29, 1916.

3 SHEETS-SHEET 3- m wm.

I II|IIII||||II|| A TTORA/EY WIN/E8858: 6% 9% @FFE,

JOHN J'. FRYNE, OF ROCHESTER, NEW YORK.

BELT-SHIFTER.

riaaaav.

Specification of Letters Patent.

Patented Aug. 29, 1916.

Application filed December 21, 1914. Serial No. 878,389.

To all whom it may concern:

Be it known that 1, JOHN J. FRYNE, of Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvement in Belt-Shifters, which improvement is fully set forth in the following specification and shown in the accompanying drawings.

The present invention relates to belt shifters and guards for those belts which operate on two stepped cone pulleys, an object of the invention being to provide a shifting mechanism which is positive in its action and will shift the belt on one pulley prior to shifting it on the other pulley.

Another object of the invention is to provide a guard for a belt which is adjustable to guard the belt while the latter operates on any step of a stepped cone pulley.

To these and other ends, the invention consists in certain parts and combinations of parts all of which will be hereinafter described, the novel features being pointed out in the appended claims.

In the drawings: Figure 1 shows the invention in front elevation with the belt adjusted to one extreme position; Fig. 2 is a like view with the belt adjusted one step from the position shown in Fig. 1; Fig. 3 is an enlarged detail view showing the stop devices which stop the movements of the belt engaging members; Fig. i is a side elevation of the invention, the guard or cage being shown in open position in dotted lines; Fig. 5 is an enlarged detail view of the lower portion of the guard; andFig. 6 is an enlarged sectional view on the line Z)Z), Fig. 5.

Referring more. particularly to the drawings, 1 indicates a shaft mounted in brackets 2 and having a stepped cone pulley 3 thereon over which travels an endless belt 4, said belt traveling also over a stepped cone pulley 5 mounted on a suitable machine such as a lathe, all of the'foregoing being well known.

The present invention employs mechanism for shifting the belt on the pulleys 3 and 5 and will now be described. Supported in any suitable manner is a frame 6 which, in this instance, is carried by a suspension piece 7 and is of rectangular form. On this frame, upper and lower belt engaging members may be mounted.

The lower belt engaging member may comprise a block 8 in which are secured two 11 and 12 which are pivoted at 13 and 14:

respectively to the block 8 and at 15 and 16 respectively to the frame 6, the link 12 having an extension arm 17 provided with a weight 18 which acts as a counter balance for the block 8 and the parts carried therethe weight of the parts will be offered to the movement of the block 8. The other link 11 is provided with an extension 19 which has a pin and slot connection 20 with the operating bar 21, the operation of which will be hereinafter described.

The upper belt engaging member or device may comprise a block 22 which has two substantially U-shaped pieces 23 and 24 secured thereto by set screws 25, these U- shaped pieces or loops having their arms curved to conform substantially to the pulley. The arms of both of the U-shaped members on one side are shorter than those on the other side, so that the belt engaging device engages the belt on opposite sides at points which are unalined transversely of the belt. This arrangement prevents buckling of the belt when shifting from one step to another step of larger diameter. This construction is not necessary upon the lower cone pulley 5 as the weight of the belt assists in the shifting action but at the upper pulley, the weight of the belt tends to hold the latter against shifting to a step of greater diameter and when the belt-engaging device engages the belt at two points transversely opposite, I have found that there is a tendency, especially on old or thin belts, for the belt to roll. This tendency is overcome when the beltengaging device is constructed as described. This upper beltengaging device may also be supported by two parallel links 26 and 27 pivoted respectively at 28 and 29 to the block 22 and at 30 and 31 to the frame 6, the arm 27 having an extension 32 which has a pin-and-slot connection 33 with an operating slide bar 34.

The operating slide bars 21 and are not operated simultaneously but instead,

by in order that little or no resistance from when shifting the. belt in either direction,

the one which operates the belt engaging device which carries" the belt downwardly on one ofthe pulleys,is' first operated and afterward, the one which operates the other belt engaging device 'is operated. v This is preferably effected "by a mechanism which is positive in its action andwhich comprises an operating-lever 35 pivotally mounted on a swinging linlc36 and pivotally connected at 37 to slide bar'38 the latter being guided longitudinally ion the frame 6. This slide bar has a'double armed lever 39 pivoted thereto at 40, the lever being in turn pivoted being disposeditowa-rd one end of the bar or while'the shoulders on the other side are -disposed toward the other end of the bar.

Preferably, these shoulders are in the form of projections with their rear faces beveled so that the shoulders may move freely when .moving in one direction.

For cooperation with the shoulders 44, theframe 6 is provided with shoulders or projections 46 while shoulders or projections 47 are provided for cooperation with the shoulders 45.

Assume that it is desired to shift the belt from the position shown in Fig. 1 to the position shown in Fig, 2: The lever is moved to the rightinyFig. 1, thus moving carries; the lever 39 and the' slides21 and 34 a -slight distance, until one of the stops on the slide 2l engages the stop shoulthe bar f38 in the 'oppositedirection. This -der 47, thus holding. the slide 21 against 7 further movement.

its movement: and the two-armed lever swings on the pivot4l causing the slide 34 to be drawnalsodownwardly until the projection 45 thereon engages the stop 47 when the slide 34 is stopped andtheupper porytionof the belt is shifted. On-the swinging of the lever 39' the slide 21 is alsoelevated "i mtil the projection".45 thereon may pass over thestop 47 when the slide again partakes of a: movement whichwill cause the two armedlever'to assume again the vertigoal position, andthe stop 45 on'the bar134 fito disengage withiits stop 47. -When the lever-39 has againreached a vertical p0si-' tion, *the lower'belt'engaging device .has

" shiftedfthe; belt'on the lower pulley 5.0ne

I step; Ifthebelt is to be shifted in the same :directionitoith'e next steps, the; operation is repeated, but' if the belt is to be shifted in vthereverse direction, the direction of move- The slide 34 continues afterward locked against movement until the upper portion of the belt is shifted. It

will thus be seen that in all instances that portion of the belt which slides from a larger diameter to a smaller is shifted before that portion which shifts from a smaller to a larger diameter and that this action is positive, not depending upon any springs or other resilient elements.

To determine when the lever 35 has been shiftedthe proper distance in moving from one step to another, the slide 38 may be provided with a series of notches 52 one for each step adjustment and, in any one of these notches, a spring 53 is received.

Another important feature of this invention is the provision of a belt guard which shifts with the belt and always lies alined with said belt. In this instance, this guard is in the form of a cage which ractically surrounds the two laps of the be t in proximity to the lower cone pulley. Preferably, this cage is formed of two members 48 and 49 each pivoted to the horizontal portion 50 of one of the U-shaped members 9 and having spring catches 51 which snap over the U-shaped members 9 in proximity to the blocks 8, said members 48 being substantially U-shaped in horizontal cross section so as to extend about those portions of the belt in proximity to the lower cone pulley 5. While the belt shifting mechanism, hereinbefore described, provides an excellent support for the belt guard as it supports said guard for movement in a line which is practically parallel with a general outline of the cone pulley, it will be] understood that the invention is not limited to this arrangement.

- From the foregoing it will be noted that there has been provided a belt shifting mechanism which is positive in its action. The belt engaging devices are connected to a member to which a common operator is connected. This member is in the form of anequalizer and exerts an equal pressure on both belt engaging devices provided no other means interferes with the action of such equalizing member. As the movement of one portionof the belt is necessarily in an upward direction on one pulley, this tends to retardthe action of the belt at such pulley, and, in this way, retards the action of one-of the belt engaging devices, immediately.throwing into action a stop device which prevents the further movement of such belt engaging device until the operator has movedthe otherbelt engaging device to shift the unresisted portion of the belt.

When the-latter action takesplace the'belt engaging device controlling theshifted portion is locked against-further action and the belt engaging device controlling the unshifted portionis unlocked so that theipressure of the operatoris transmitted "to the unshifted portion of the belt-to shift the latter, and thereafterto unlockor release the beltengaging devicefirst shifted, "thus placing the mechanism in condition for further-action. Thebelt is only shifted one stepat-a time and maybe shifted in-either direction. As the belt engaging devices pass "about both laps ofthe belt'm proximityto both pulleys, the-belt may be shifted when the pulleys are turning ineitherdirection. Each belt engagingdevice is supported by parallel links'and-moves on a line which is substantially parallel with the high points ofthe pulley, sothat-each beltengaging device may bepositioned about the same distance from each step and lie substantially in the same relation to the several steps.

gaging device oftheshifter toguard the belt as the latter operates on any step of'the pulley.

2. A belt shifting mechanism for a belt operating on'two stepped cone; pulleys comprising two belt engagingdevicesfor cooperating with-such a belt near its two pulleys, a common operator for the-belt engaging devices, and two stop devices,'one for each belt engaging device one brought into action when the belt" is moved in one direction to hold its belt engaging device against movement by the; operator until the other belt engaging device has shifted "a portion of the belt, and theotherstop device acting in the same manner when the belt is moved in the other direction.

3. A belt shifting mechanism for abelt operating on two stepped cone pulleys comprising two belt engaging devices for cooperating with such a belt near its two pulleys, two stopping means each forpositively holding one of the belt engaging devices against movement until the other has moved toshift aportion ofthe beltyand a' common operator for the belt engaging devices adapted to bring one of said stopping means into action whenthe-belt is shifted in one direction andthe other of said means into action when-thebelt is shifte'd in the other direction.

4.-A belt shifting mechanism for -a belt operating on two stepped cone pulleys com- ;pri'singtwo-belt engaging devices for cooperating'withsuch a belt near its two pul- -leys, a member connected to the-belt engag ing devices, an operator connected to said member between the points of connection with the belt engaging devices, and two stop devices for holding said member against' movement oneither side of the connecti'on with the operator, one of said devi'ces operating when the belt is shifted in one direction-andtheother when the belt is shifted in the other direction.

5.-Abeltshiftin'g mechanism for a belt operating on two stepped cone pulleys comprising two beltengaging devices for cooperating withsuch-a belt near its two pulleys, an operator common to both of such devices,-amember connected to the" operator and tothe belt engaging devices, and two means for holding different portions of said member against movement to hold one or the other of said belt engaging devices a-gainst movement, one of said means acting when thebelt-is shifted in one direction and the other of said means acting when the belt "is shifted int-he other direction.

6. Abelt shifting mechanism for a belt "operating ontwo stepped cone pulleys comprising two belt engaging devices for engaging such a'belt near the two pulleys, two

operating mechanisms, one for operating each-belt'engaigin'g device, a common operator connected to both mechanisms, and stop devices for each operating mechanism arranged to be brought into operation to stop such mechanism when the latter'has shifted itsbelt engaging device in advance of-the' other belt engaging device so that the commOnoperator'may act to move the operating mechanism of said other beltengagin device.

- A-beltshifting-mechanism fora belt operating on two stepped cone pulleys comprising two belt engaging devices for c0- operating with such abelt near its two pulleys,- anoperator common to both of such devices, a member connected to the operator and to both belt engaging devices, two series of suitably supported stops having connection with saidmember, andtwo fixed stops each adapted to cooperate with one of the series of'stopsand each acting to hold one of said beltengaging devices against' movement until the other-of said belt engaging devices has shifted'a portion of the belt, one ofsai-d stops being-effective when the belt -is-shifted in one direction and the other when th belt is shifted in'theother direction. v

S-A-beIV-Shifting mechanism for abelt operating on two steppedconepulleys comprising we belt vengaglng devices for co operating with such a belt; near the pulleys,

an operator common to botho'f said devices,

a "lever having the operator pivotally connected therewith between its ends, two slides pivotally connectedto the ends of said lever andeachoperatively connected to one of the belt engaging devices, said slides each ha'v mg a "rocking movement, and each be ng 4 provided with a series of stops thereon,- and two fixed stops each adapted to cooperate with one 'of the'se'ries'of stops to holdthe corresponding slide againstmovement in orden-to prevent one of the' belt engaging devices beingshifted' until the other belt engaging device'has been shifted, one series f-ofst'ops being brought into'operation when the beltis shifted in one direction and the other series'of stops beingbrought into op- 'eration'when'th'ebelt is shifted inthe other direction.

9. A belt shifting mechanism for a belt operating on two steppedconepulleys comprising-two belt engaging devices for co- 7 operating with sucha belt near'its two pul- 'leys, a common-operator for such devices, a lever having the; operator pivotally connected thereto between its ends, two slides pivotally connected to the ends of said-lever, and each operatively 'connected' to'one of 1 *saidbelt'engaging devices, said-slides each 'havlng arocklng movement and each belng provided with "two SeIlS ofi'stops thereon,

the members of one series of stops being dis- "posed in the direction opposit to 'that of the other series,two pairs'offixedstops, one

jpainforeach slide, the members of said pairsjbeingarranged to cooperate withthe itw-o seriesof st0ps,io'ne series otstops on one slide being brought into operation to holdthe slide against jm'ovement while'the otherjslide "moves to carry-oneof the series of stops Y foperating on two stepped eone' pulleys com- "shifted, so

"thereon intOLengagement'with one of the "fixed stops to'hold such slide'against movement in order to free the first-held slide to permit the latter to be "moved by the-opera- 'to'rfuntilthe 'other'portion of theibelt' is ""10. A belt shifting'mech'anism for a belt operating on two stepped cone pulleys comprising two belt engaging devices for engaging -tl'1ebelt 'near the twopulleysand two pairs ofparallel links each pivotallyi conmeted-to one-of the belt-engaging devices and to a suitable support-" "11; "A beltshi'fting mechanism for a belt p sfin g' two'belt engaging devices for engagthe- 'belt near the two pulleys, two mem- "bers havingconnection with said belten- V gaging j devices, a lever pivotally connected 7 at its ends to both of said members, and an goperator having pivotal connection with j 's aidlevei between the ends "of thelatter.

bers having connection with said belt engaging-devices, a'leveipivotally'connected at its ends to' said members, an operator, a swinging link on'which the operator is pivotally mounted, and a link pivotally con nected to the operator and to the lever between the ends-of the latter. 14. A belt shiftingmechanism for a belt operating ontwo stepped cone pulleys comprising two belt engaging devices for engaging a belt near its two pulleys, two slides I each connected to one of the belt engaging devices, a lever pivotally connected at its ends to the two slides, an operator, a swinging link on which the operator is mounted, and a link pivotally connected to the operator and to the lever between the ends of the latter. I i

1 5.; A belt shifting mechanism for abelt operating on two stepped cone pulleys comprising two belt engaging devices for engaging a belt near its two pulleys, two pairs of parallel links 'each'pivotally connected to a belt engaging device, two members each connected to one pair of links, a lever pivoted at its ends to the two members, and an operator connected 0 the lever between said ends. 1 a

16. A'beltshifting mechanism fora belt operating on two stepped conepulleys coniprising'two belt engaging devices for engaging a belt near its two pulleys, two pairs of parallel links each pivotally'connected to a belt engaging device, two slides each conneeted to one pair of links, a lever pivotally connected to both slides at its ends, and an operator connected to the lever between the ends of the latter.

operating on two stepped cone pulleys compr sing' a belt engaglng device which has two portlonsfor cooperating with opposlte edges of a belt, said portions being unalined-llorizontally transversely of the belt." A

w 184In combination with a stepped cone pulley and a belt operating thereon, a guard for the belt, and means for adjustably supporting the guard soithat it inay guard the belt as the latter operates on any step of the pulley. '1. A", g I Y 19. I n combination with a stepped cone :pun'e'y and. a belt operatingthereon, a guard 17 A belt shifting mechanism for a belt for the belt, and a swinging link supporting said guard for adjustment to any step of the pulley.

20. In combination with a stepped cone pulley and a belt operating thereon, a guard for the belt and a pair of parallel links for supporting said guard for adjustment to any step of the pulley.

21. In combination with a stepped cone pulley and a belt operating thereon, of a guard cage surrounding both laps of the belt in proximity to the pulley, the lower end of said cage being curved substantially to conform to the pulley.

22. In combination with a stepped cone pulley and a belt operating thereon, of a guard cage surrounding both laps of the belt in proximity to the pulley and formed of two parts movable relatively to each other.

23. In combination with a stepped cone pulley and a belt operating thereon, a guard cage surrounding both laps of the belt in proximity to the pulley and formed of two relatively movable parts, each of U-shape in cross section.

24. In combination with a stepped cone pulley and a belt operating thereon, a guard cage formed of two parts and surrounding the belt in proximity to the pulley, and a movable support for said cage surrounding both laps of the belt.

25. In combination with a stepped cone pulley and a belt operating thereon, a movable support arranged between the laps of the belt in proximity to the pulley, loops extending in opposite directions from the support about the laps of the belt, and a guard cage supported by said loops and extending about the two laps of the belt.

26. In combination with a stepped cone pulley and a belt operating thereon, a movable support arranged between the laps of the belt in proximity to the pulley, loops extending in opposite directions from the support about the laps of the belt, and a guard cage supported by said loops and extending about the two laps of the belt, said guard cage comprising two members hinged to the loops.

JOHN J. FRYNE. Witnesses:

H. H. SIMMs, ADA M. WHITMORE.

Uopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

